Metal treatment – Compositions – Heat treating
Patent
1984-07-30
1985-07-16
O'Keefe, Veronica
Metal treatment
Compositions
Heat treating
149 115R, 149 115P, 149 115N, 149 12R, 291568R, 291568CF, 29DIG31, 420902, B22F 504, B23P 1504
Patent
active
045294526
ABSTRACT:
A component, such as a turbine disk, made from a metal or metal alloy which has been processed to display superplastic properties at elevated temperatures, is diffusion bonded to a component or components, such as turbine blades, made from another metal or metal alloy, by disposing the components in a press with the surfaces to be bonded in mating contact. Moisture and oxygen are removed from between the surfaces. Heat and pressure are then applied, such as by forging at an elevated temperature or by hot isostatic pressing, to cause superplastic deformation of at least one of the components at the bonding surfaces. The heat and pressure are held sufficiently long to diffusion bond the surfaces. The new integral assembly is then heat treated to obtain desired properties. Consistently good diffusion bonds are achieved by this method.
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O'Keefe Veronica
Revis Stephen E.
United Technologies Corporation
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